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Replacement Water Filters: Undersink

Don’t settle for a replacement under sink water filter cartridge that simply fits, find one designed and manufactured specifically for your under sink water filter system.

Discount Filter Store has one of the largest selections of undersink filter cartridges. With under sink filter cartridges available in over 15+ different filter medias, 8+ different sizes (5x2½ - 20x4½), and a wide variety of filter life’s ranging from 250 gallons to 50,000+ gallons, you’re guaranteed to find the under sink water filter system and/or replacement cartridges you need. Choose from hundreds of under sink water filter cartridges from some of the industry’s top brands including American Plumber, Crystal Quest, Pentek®, Culligan®, GE, Aqua-Pure®, Whirlpool®, and more.

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  • AP327 3M Aqua-Pure Water Filter Replacement Cartridge
  • DW-200-R American Plumber Undersink Filter Replacement Cartridge
  • WCC American Plumber Undersink Filter Replacement Cartridge
  • WGC478 American Plumber Undersink Compact Filter Replacement Cartridge
  • WGCHD American Plumber Undersink Water Filter Replacement Cartridge
  • 3M Aqua-Pure AP317 Water Filter Replacement Cartridge
  • 3M Aqua-Pure AP517 Water Filter Replacement Cartridge
  • 3M Aqua-Pure AP-C77 Undersink Filter Replacement Cartridge
  • 3M Aqua-Pure AP-DW70 Undersink Filter Replacement Cartridge
  • D-28 Culligan Level 1 Undersink Filter Replacement Cartridge
  • P1012581 Culligan Undersink Replacement Filter Cartridge
  • GAC1SS OmniFilter Series C Undersink Filter Replacement Cartridge
  • GAC-10 Pentek Undersink Filter Replacement Cartridge

    GAC-10 Pentek Undersink Filter Replacement Cartridge

    $12.99 Retail Price:  $17.99
  • GAC-20 Pentek Replacement Filter Cartridge

    GAC-20 Pentek Replacement Filter Cartridge

    $21.99 Retail Price:  $23.56
  • GAC-5 Pentek Replacement Filter Cartridge
  • GAC-BB Pentek Replacement Filter Cartridge

    GAC-BB Pentek Replacement Filter Cartridge

    $25.99 Retail Price:  $30.51
  • QC10-GACR Pentek Undersink Quick-Change Replacement Filter Cartridge
  • QC10-TSGACR Pentek Undersink Quick-Change Replacement Filter Cartridge
  • TSGAC-10 Pentek Undersink Filter Replacement Cartridge

    TSGAC-10 Pentek Undersink Filter Replacement Cartridge

    $20.99 Retail Price:  $24.60
  • 47-55712G2 Water Factory Systems Replacement Filter Cartridge
  • 47-5574704 Water Factory Systems FaucetMATE Carbon Block Filter
  • MATRIKX-Pb1-10 KX Technologies MatrikX Undersink Filter Replacement Cartridge
  • MATRIKX-Pb1-HD10 KX Technologies MatrikX Undersink Filter Replacement Cartridge
  • 32-250-125-050 KX Technologies Replacement Filter Cartridge
  • CBR2-10 Pentek Undersink Filter Replacement Cartridge
  • CBR2-10R Pentek Undersink Filter Replacement Cartridge

    CBR2-10R Pentek Undersink Filter Replacement Cartridge

    $18.99 Retail Price:  $21.95
  • CC-10 Pentek Undersink Filter Replacement Cartridge

    CC-10 Pentek Undersink Filter Replacement Cartridge

    $14.99 Retail Price:  $15.34
  • 20035 Hydrologic 4-Stage Reverse Osmosis Cartridge

    22035 Hydrologic 4-Stage Reverse Osmosis Cartridge

    $128.99 Retail Price:  $215.04
  • D-25 Culligan Under Sink Water Filter

    D-25 Culligan Under Sink Water Filter

    $11.99 Retail Price:  $16.99
  • DUPONT-WFQTC90001

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